republican senator marco rubio says the bill will provide a path to citizenship for the estimated 11 million undocumented immigrants in this country. however, he says, it will not be amnesty for those who entered the country illegally. >>> the supreme court is hearing two sides of a case that could have big implications for medical research. the question is, can a human gene be patented? danielle nottingham has more. >> reporter: the biotech company myriad genetics argues its patent on the human gene is valid. the genes can show if a person has a greater chance of breast or ovarian cancer. but opponents argue that genes are part of nature and that no one the right to patent a part of the human body and they claim patents block other biocompanies from testing on the genes which could prevent potentially life saving cancer breakthroughs. the supreme court's ruling could have an impact on other patents for vaccines, antibiotics, stem cells and hormones. biotech companies argue what they're patenting is not a part of nature. >> instead what is being patented are d.n.a. sequences that are